NASA STTR 2015 Solicitation


PROPOSAL NUMBER: 15-1 T4.01-9934
RESEARCH SUBTOPIC TITLE: Dynamic Servoelastic (DSE) Network Control, Modeling and Optimization
PROPOSAL TITLE: Gust Load Estimation and Rejection With Application to Robust Flight Control Design for HALE Aircraft

NAME: Systems Technology, Inc. NAME: University of Michigan
STREET: 13766 Hawthorne Boulevard STREET: 3003 S State Street, 1061 Wolverine Tower
CITY: Hawthorne CITY: Ann Arbor
STATE/ZIP: CA  90250 - 7083 STATE/ZIP: MI  48109 - 1274
PHONE: (310) 679-2281 PHONE: (734) 764-7242

PRINCIPAL INVESTIGATOR/PROJECT MANAGER (Name, E-mail, Mail Address, City/State/Zip, Phone)
Mr Brian P Danowsky
13766 Hawthorne Blvd.
Hawthorne, CA 90250 - 7083
(310) 679-2281 Extension :128

CORPORATE/BUSINESS OFFICIAL (Name, E-mail, Mail Address, City/State/Zip, Phone)
Mrs Suzie Fosmore
13766 Hawthorne Boulevard
Hawthorne, CA 90250 - 7083
(310) 679-2281 Extension :146

Estimated Technology Readiness Level (TRL) at beginning and end of contract:
Begin: 1
End: 3

Technology Available (TAV) Subtopics
Dynamic Servoelastic (DSE) Network Control, Modeling and Optimization is a Technology Available (TAV) subtopic that includes NASA Intellectual Property (IP). Do you plan to use the NASA IP under the award?

TECHNICAL ABSTRACT (Limit 2000 characters, approximately 200 words)
High Altitude Long Endurance (HALE) aircraft have garnered increased interest in recent years as they can serve several purposes, including many of the objectives of satellites while incurring a fraction of the cost to deploy. Examples applications include Intelligence, Surveillance, and Reconnaissance, communications relay systems, and environmental and atmospheric sensing. The requirements for HALE aircraft dictate that they have very high lift-to-drag ratios, and are extremely lightweight, resulting in high aspect ratios with significant structural flexibility. This results in a dynamically nonlinear vehicle with highly coupled rigid body and aeroelastic structural dynamics. Atmospheric turbulence and gust loading of substantial variance can significantly impact the performance of HALE aircraft. Due to the vast importance of gust loading on these lightweight aircraft platforms, Systems Technology, Inc. and the University of Michigan propose the development of the Disturbance Observer for Gust Load Alleviation (DOGLA) where the gust loading will be actively estimated and subsequently rejected. DOGLA will be implemented on a nonlinear HALE aircraft model in conjunction with a robust primary flight control design. Both the disturbance observer and primary flight control designs will be implemented within a novel gain-scheduling framework to address nonlinear dynamics and varying flight conditions.

POTENTIAL NASA COMMERCIAL APPLICATIONS (Limit 1500 characters, approximately 150 words)
DOGLA falls under the NASA Aeronautical Research Mission Directorate (ARMD), which in 2014 announced six research thrusts. DOGLA applies to several of these thrusts. First, DOGLA directly contributes to the "assured autonomy for aviation transformation" thrust by allowing an automatic system to alleviate gust loading without impacting performance of the primary flight control system. The proposed innovation also supports the "real-time, system-wide safety assurance" and "ultra-efficient commercial vehicles" research thrusts. In terms of specific ARMD programs, DOGLA applies to: 1) the Fundamental Aeronautics Program wherein DOGLA provides an advanced technology to improve performance of current and future air vehicles; 2) Aviation Safety Program wherein the technology supports assurance of flight critical systems and assurance of safe and effective aircraft control under hazardous conditions; and 3) the Aeronautics Test Program wherein the technology can enhance test operations of new, novel technology demonstrators including the NASA Global Hawk HALE and the X-56A.

POTENTIAL NON-NASA COMMERCIAL APPLICATIONS (Limit 1500 characters, approximately 150 words)
DOGLA has application to the worldwide aircraft manufacturing industry of both manned and unmanned aircraft, with focus on HALE aircraft. Current DoD programs that will benefit from DOGLA include the Boeing Phantom Eye and the DARPA Vulture, which are for long endurance advanced ISR, driven by current US military combat conditions. In the commercial market, HALE vehicles are garnering interest as communications relay systems. Both Google and Facebook are pursuing HALE technology to provide internet access to remote areas. Google and Facebook have recently purchased Titan Aerospace and Ascenta respectively, who have been developing solar powered HALE UAS for this purpose. Other companies that specialize in HALE aircraft that would benefit from DOGLA include Aurora Flight Sciences (Perseus and Theseus aircraft) and Solar Flight (Sunseeker and SUNSTAR solar powered aircraft). DOGLA has application to non-HALE flexible aircraft as well, and this includes airliners developed by both Boeing and Airbus.

TECHNOLOGY TAXONOMY MAPPING (NASA's technology taxonomy has been developed by the SBIR-STTR program to disseminate awareness of proposed and awarded R/R&D in the agency. It is a listing of over 100 technologies, sorted into broad categories, of interest to NASA.)
Air Transportation & Safety
Algorithms/Control Software & Systems (see also Autonomous Systems)
Machines/Mechanical Subsystems
Models & Simulations (see also Testing & Evaluation)
Sensor Nodes & Webs (see also Communications, Networking & Signal Transport)
Software Tools (Analysis, Design)
Vehicles (see also Autonomous Systems)

Form Generated on 04-23-15 15:37